Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Subaru Forester BaseFACTORY OEM SERVICE PROCEDURE
Automatic Transmission (Diagnostics)
- Basic Diagnostic Procedure
- Check List for Interview
- General Description
- Electrical Components Location
- Transmission Control Module (TCM) I/O Signal
- Subaru Select Monitor
- Read Diagnostic Trouble Code (DTC)
- Inspection Mode
- Clear Memory Mode
- AT OIL TEMP Warning Light Display
- List of Diagnostic Trouble Code (DTC)
- Diagnostic Procedure for AT OIL TEMP Warning Light
- Diagnostic Procedure for Select Monitor Communication
- Diagnostic Procedure with Diagnostic Trouble Code (DTC)
- DTC 11: Engine Speed Signal
- DTC 27: ATF Temperature Sensor
- DTC 31: Throttle Position Sensor
- DTC 33: Front Vehicle Speed Sensor
- DTC 36: Torque Converter Turbine Speed Sensor
- DTC 38: Torque Control Signal
- DTC 45: Intake Manifold Pressure Signal
- DTC 71: Shift Solenoid 1
- DTC 72: Shift Solenoid 2
- DTC 73: Low Clutch Timing Solenoid
- DTC 74: 2-4 Brake Timing Solenoid
- DTC 75: Line Pressure Duty Solenoid
- DTC 76: 2-4 Brake Duty Solenoid
- DTC 77: Lock-Up Duty Solenoid
- DTC 79: Transfer Duty Solenoid
- DTC 93: Rear Vehicle Speed Sensor
- Diagnostic Procedure for No-diagnostic Trouble Code (DTC)
- Symptom Related Diagnostic
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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